End cover with purging structure

Abstract

The utility model discloses an end cover with a purging structure, which comprises an end cover main body, the end cover main body is connected with a shell of a vacuum pump, the front end of the end cover main body is provided with a first open hole which does not penetrate through the end cover main body, the lower end of the end cover main body is provided with a second open hole, the first open hole is communicated with the second open hole, and the end cover main body is connected with the shell of the vacuum pump. And a purging assembly is arranged at the side end of the end cover main body, extends into the second open hole, and is used for introducing inert gas and spraying the inert gas to the second open hole. By means of the purging assembly, nitrogen purging is provided in the exhaust process, dust and other particle impurities are not prone to blocking the exhaust port, the exhaust temperature is reduced, and meanwhile dust in the machine shell can be conveniently blown out.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum pumps, and particularly relates to an end cover with a purge structure. Background Art

[0002] A vacuum pump refers to a device or equipment that uses mechanical, physical, chemical or physicochemical methods to evacuate the container to obtain a vacuum. It is mainly composed of components such as a casing, a rotor, a motor, and a gearbox. For example, the cooling structure of a vacuum pump provided in patent number CN217539013U includes a pump body, a first cooling component, a gearbox, a second cooling component and an end cover. Exhaust is achieved at one of the end cover positions. During actual use, it was found that the exhaust end cover position is easily blocked by dust, and the exhaust temperature is high, affecting the use effect. Utility Model Content

[0003] The utility model aims to avoid the deficiencies in the prior art and provides an end cover with a purge structure for improving the exhaust effect.

[0004] The utility model solves the technical problem by adopting the following technical solution: an end cover with a purge structure, comprising an end cover body, the end cover body being connected to the casing of the vacuum pump, a first opening being provided at the front end of the end cover body, the first opening not penetrating the end cover body, a second opening being provided at the lower end of the end cover body, the first opening being communicated with the second opening, a purge assembly being provided at the side end of the end cover body, the purge assembly extending into the second opening, the purge assembly being used to receive inert gas and spray the inert gas into the second opening.

[0005] In several embodiments, the purge assembly includes a connecting plate, a connecting head and a blow pipe, the connecting head is arranged on the connecting plate, one end of the connecting head is connected to the blow pipe, and the other end of the connecting head is connected to an external air source, and the connecting plate is arranged on the end cover body.

[0006] In several embodiments, a blowing port is provided at a side end of the end cover body, the blowing port is communicated with the first opening and the second opening, and the connecting plate is covered on the blowing port.

[0007] In several embodiments, the blowing pipe is bent, the blowing pipe extends to the second opening, and the end of the blowing pipe is vertically downward.

[0008] In several embodiments, a cavity is provided in the end cover body, two third openings are provided at the upper end of the end cover body, and a fourth opening is provided at the lower end of the end cover body, and the third opening and the fourth opening are both connected to the cavity.

[0009] In several embodiments, a mounting plate is provided in the end cover body, and two axial holes are provided in the mounting plate.

[0010] In several embodiments, the cavity forms an intermediate flow channel between the mounting plate and the bottom wall of the first opening, the intermediate flow channel is curved, one end of the intermediate flow channel leads to a third opening, and the other end of the intermediate flow channel leads to the fourth opening.

[0011] The utility model has the following beneficial effects:

[0012] The utility model provides nitrogen purge during exhaust through the purge component, so that dust and other particulate impurities are not easy to block the exhaust port, the exhaust temperature is reduced, and the dust in the casing is blown out easily.

[0013] The utility model realizes the exhaust function by providing a flow channel structure in cooperation with the cavity inside through the structure of the first opening, the second opening, the third opening and the fourth opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are for illustrative purposes only of selected embodiments and do not represent all possible implementations, and should not be considered to limit the scope of the present invention.

[0015] Figure 1 The overall structure of the end cover with a purge structure in this embodiment is schematically shown;

[0016] Figure 2 Schematically shows Figure 1 A structure in another perspective;

[0017] Figure 3 Schematically shows Figure 1 The side view structure;

[0018] Figure 4 Schematically shows Figure 3 Cross-sectional structure in the middle AA direction;

[0019] Figure 5 Schematically shows Figure 1 Amplified structure of the purge assembly. DETAILED DESCRIPTION

[0020] Below, the embodiments of the present invention are described in detail with reference to the accompanying drawings. In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described in combination with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in conjunction with the accompanying drawings is not intended to limit the scope of the present invention for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] like Figure 1-Figure 5 As shown, the end cover with a purge structure provided in this embodiment includes an end cover body 10, which is connected to the casing of the vacuum pump, and a rotor component is arranged in the casing. A cavity 101 is provided in the end cover body 10, and a first opening 11 is provided at the front end of the end cover body 10, which does not penetrate the end cover body 10. A second opening 12 is provided at the lower end of the end cover body 10, and the first opening 11 is communicated with the second opening 12. A purge assembly 20 is provided at the side end of the end cover body 10, and the purge assembly 20 extends into the second opening 12. The purge assembly 20 is used to connect to an inert gas and spray the inert gas into the second opening 12. The inert gas used is, for example, nitrogen.

[0023] Among them, the first opening 11 is not connected to the cavity 101, and its shape is generally fan-shaped. The second opening 12 is located at a corner on one side and is connected to the bottom side of the second opening 11. The first opening 11 is only connected to the second opening 11.

[0024] Furthermore, two third openings 14 are provided at the upper end of the end cover body 10 , and a fourth opening 15 is provided at the lower end of the end cover body 10 . Both the third opening 14 and the fourth opening 15 are in communication with the cavity 101 .

[0025] Furthermore, a mounting plate 16 is provided in the end cover body 10 , and two shaft holes 161 are provided in the mounting plate 16 . The shaft holes are used to be provided on the rotor shaft and the corresponding bearing components.

[0026] In addition, the cavity 101 forms an intermediate flow channel 102 between the mounting plate 16 and the bottom wall of the first opening 11. The intermediate flow channel 102 is bent and has an arc-shaped structure. One end of the intermediate flow channel 102 leads to a third opening 14, and the other end of the intermediate flow channel 102 leads to the fourth opening 15, that is, both third openings 14 are connected to, and only connected to, the fourth opening 15 for exhaust.

[0027] Furthermore, an air blowing port 13 is provided at a side end of the end cover body 10 , and the air blowing port 13 is communicated with the first opening 11 and the second opening 12 .

[0028] The purge assembly 20 includes a connecting plate 21, a connecting head 22 and a blow pipe 23. The connecting head 22 is arranged on the connecting plate 21. One end of the connecting head 22 is connected to the blow pipe 23, and the other end of the connecting head 22 is connected to an external air source. The connecting plate 21 is arranged on the end cover body 10. Specifically, the connecting plate 21 is covered on the blow port 13 to cover and seal the blow port 13.

[0029] The blowing pipe 23 is bent and generally has an L-shaped structure. The blowing pipe 23 extends to the second opening 12 , and the end of the blowing pipe 23 is vertically downward. Nitrogen is sprayed out through the blowing pipe 23 for purging.

[0030] The scope of the present invention is not limited by the above-described embodiments but by the appended claims and their equivalents.

[0031] The terms used herein are intended to explain the embodiments and are not intended to limit and / or define the present invention. It should be understood that the terms "front", "back", "left", "right", "head", "tail", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the product of the utility model is usually placed when in use, or are the directions or positional relationships commonly understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

Claims

1. An end cover with a purge structure, comprising an end cover body (10), wherein the end cover body (10) is connected to a housing of a vacuum pump, and is characterized in that: The front end of the end cover body (10) is provided with a first opening (11), and the first opening (11) does not penetrate the end cover body (10); the lower end of the end cover body (10) is provided with a second opening (12), and the first opening (11) is communicated with the second opening (12); the side end of the end cover body (10) is provided with a purge assembly (20), and the purge assembly (20) extends into the second opening (12), and the purge assembly (20) is used to receive inert gas and spray the inert gas into the second opening (12).

2. The end cover with a purge structure according to claim 1, characterized in that: The purge assembly (20) comprises a connecting plate (21), a connecting head (22) and a blowing pipe (23); the connecting head (22) is arranged on the connecting plate (21); one end of the connecting head (22) is connected to the blowing pipe (23); the other end of the connecting head (22) is connected to an external air source; and the connecting plate (21) is arranged on the end cover body (10).

3. The end cover with a purge structure according to claim 2, characterized in that: The side end of the end cover body (10) is provided with an air blowing port (13), the air blowing port (13) is connected with the first opening (11) and the second opening (12), and the connecting plate (21) is covered on the air blowing port (13).

4. The end cover with a purge structure according to claim 2, characterized in that: The blowing pipe (23) is bent and extends to the second opening (12), and the end of the blowing pipe (23) is vertically downward.

5. The end cover with a purge structure according to claim 1, characterized in that: A cavity (101) is provided in the end cover body (10), two third openings (14) are provided at the upper end of the end cover body (10), and a fourth opening (15) is provided at the lower end of the end cover body (10), and the third openings (14) and the fourth openings (15) are both communicated with the cavity (101).

6. The end cover with a purge structure according to claim 5, characterized in that: A mounting plate (16) is provided in the end cover body (10), and two shaft holes (161) are provided in the mounting plate (16).

7. The end cover with a purge structure according to claim 6, characterized in that: The cavity (101) forms an intermediate flow channel (102) between the mounting plate (16) and the bottom wall of the first opening (11); the intermediate flow channel (102) is bent, one end of the intermediate flow channel (102) leads to a third opening (14), and the other end of the intermediate flow channel (102) leads to a fourth opening (15).

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